✦ LIBER ✦

13C1H NMR Long-range coupling and deuterium isotope effects of flavanones

✍ Scribed by J.H. Jung; J.L. McLaughlin

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 321 KB
Volume: 29
Category: Article
ISSN: 0031-9422
DOI: 10.1016/0031-9422(90)85441-h

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

13C NMR spectra and long-range 13CH cou

13C NMR spectra and long-range 13CH couplings in substituted ethylenes

✍ K.M. Crecely; R.W. Crecely; J.H. Goldstein 📂 Article 📅 1971 🏛 Elsevier Science 🌐 English ⚖ 560 KB

Long-range deuterium isotope effects on

Long-range deuterium isotope effects on 13C NMR shifts of intramolecularly hydrogen-bonded 9-hydroxyphenalen-1-ones

✍ Carin Engdahl; Adolf Gogoll; Ulf Edlund 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 780 KB

The 'H and "C NMR spectra of 9-bydroxyphenalenone (1) and 9-hydroxy-2-methylpbnalenone (2) have been completely assigned. Primary and secondary deuterium isotope effects were determined in three solvents (chloroform, acetone and dimethyl sulphoxide), including the effect of temperature on t b second

High-resolution 13C NMR spectra and long

High-resolution 13C NMR spectra and long-range 13C1H spin coupling constants in pyridine and 2-bromopyridine

✍ M Hansen; H.J Jakobsen 📂 Article 📅 1973 🏛 Elsevier Science ⚖ 601 KB

Long-range deuterium isotope effects on

Long-range deuterium isotope effects on 13C chemical shifts of intramolecularly hydrogen-bonded compounds. Purpurogallins

✍ Poul Erik Hansen 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 351 KB 👁 1 views

## Abstract Long‐range deuterium isotope effects on ^13^C chemical shifts, ^__n__^ΔC(OD), were studied in the intramolecularly hydrogen‐bonded purpurogallins (benzotropolones). A very large long‐range isotope effect from the hydrogenbonded 4‐OH(D) is observed over six bonds at C‐7. Further, long‐ra

Assignments of 13C NMR spectra from resi

Assignments of 13C NMR spectra from residual splittings of long-range 13C-1H coupling constants obtained by off resonance irradiation

✍ S Sorensen; M Hansen; H.J Jakobsen 📂 Article 📅 1973 🏛 Elsevier Science ⚖ 185 KB

Deuterium-induced primary and secondary

Deuterium-induced primary and secondary isotope effects on 13C,H coupling constants in halomethanes

✍ N. D. Sergeyeva; N. M. Sergeyev; W. T. Raynes 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 200 KB 👁 1 views

Primary p\*J(13C,H) and secondary s\*J(13C,H) isotope e †ects on carbonÈproton coupling constants were measured in studies of proton-and deuteron-coupled 13C NMR spectra of the halomethanes CH n D m X 4~n~m , where X is Cl, Br or I. Both e †ects are always negative. The magnitudes of p\*J(13C,H) inc